Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c9929bc4428e55c14a1c45004f36f1589c83da5eb3e1acf596c16e01aafa9eee' 
  AND token = 'GHcmevuU4em1xb/EtDDJLH4j2Cb0wwRkEluVzOBGbKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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