Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'adccf6ce2d6712f8d7f7148fcfba7efd14b455152506b1bedba0d1777eadf1f6' 
  AND token = 'Zq0yKA7EBeu8pjcvU1a8X+QUKHIPFge0vC7FHuqB5Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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