Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '28a55186bd413be29f3a67eb285e79c465e0fa5470073158138e677de0a712a3' 
  AND token = 'llorKmYIFYyKbmssYFHHc3Zd6dfl3lkRus3sYh7lD2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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