Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52937dc62e4d27fbc2588f234aea60b113167eae7c206ad131bfd291f4e47d59' 
  AND token = '9mDMhI6Q6Xl8IrNNVg4oZ8+37lkTCOBj4v6dPQqfDzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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