Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55446b3a0500b62826a7d57fe52a804ba3b572f367b52b813fa64696be94c2d7' 
  AND token = '8TAEcrN/KSvz5Kl5J8+uDwnM5oP1NCf1eua7pWM9fhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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