Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e6fbac1b177049b7ad0de6537be11ed118bb0d942be9487e005f9d9bd5fadf22' 
  AND token = 'mT1SwxRjjvojZXswcdGiYHGOxcQmexjA8lcGnQGZC4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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