Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b23aea06103373d6c3cfe6ecc093840e2cb2cd9ecb129803e9fbb5fec8d9deeb' 
  AND token = 'taGqNGur8VqAcyA+cL/RJrJrU7Uw3dovh9KK0aikfys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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