Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '700a717db8009300facd6a462272bf1a0b15e52252c013c6e3e665446b8b06f8' 
  AND token = '6Zk7tU5q/TEsvnMeOdD6XcCodwmMMuuP/A8w5J6jAcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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