Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de3e8559a9236e01aee513967d2453be04587810a6f2253f4ec2064bc3cef1e3' 
  AND token = 'LVxXBrkzFuD9vG9pU8Iry5hPgMS2euocBrXr4p28q9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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