Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '956a1145caa301672337ae1ac5c8facd36fd34a7b271355b5059215d8c51036f' 
  AND token = '6LbGqogXTHlHtVHC5++UrtHq5hjN7fMQeCf1GmmQPMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}