Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9972c915ea404db63ed38ccea364639c47826093fe7594f82bd3103c9c97e135' 
  AND token = 'xdZFgrgiDSXOuR3N18ivgXEcts8lxO3O+qI3bgTFVkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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