Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b8e4ce8bcbcf3d96e010612c0f37642d50eaf2e8ecc0efbbe3b4dc4e68d6e69' 
  AND token = 'otmM7tJyY/K78M8sNQTbR9+P/5LI0eTQJ5m7/e+kG48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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