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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45007299e9cc043c2dfe1c608dc3c20646d31fb08699b4106c4de99fde914cce' 
  AND token = 'cbb6DhkEePkcOJ5EIdcbHQpDL0FoU3a/O/O4/y3q2Ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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