Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636cff750426f10d625a02331e1d1a558abe39614840a00f384166576b3f4b8a' 
  AND token = '5GN5V+92IuG6H3B3ZVnh0Pe3xoEQpBbblvNzWVRJ2t8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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