Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f03044664e93035b7613b078acc1bf1a40b34bcdf5612d7db1c8f3b7c2141c11' 
  AND token = '4txbxGqnY9lEHYzn0jI5Gz4fJ22dWJEZRYinxg2cGZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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