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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '092f6c374c26ca6693db581214715be01ce83299b181a62f5a7e6e610a5d3890' 
  AND token = 'Y4/Eq4lqsXZYH6H7VDOy+RfJ4QHisLgyGNPPQ0on54c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}