Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc751a1a167ef04799f11b818b5da2d4146554aa63330ecf8c4f2396e0834b4c' 
  AND token = 'kvNbH9cHFMEI8lpCdh5ab8FJXAcT1kuBhPkeP354W0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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