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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '065aa708f50a60238814f3613414b05495d77732fc1a3ba080819dec22ec6c49' 
  AND token = 'BVm4wDV8H4iyU/MDERkwwFtO4M81oiWiQykty9PwMM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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