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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23479cf5e29b22c7174e2a8c99508647a7de2f107711907464f59875ebdde482' 
  AND token = 'YbWI0RacjQv5M0c1yi/nKYgfVJ98nW8xevrpG2ESmSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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