Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acd223c0d1dd82b8850ea595b3e2ee659b8cc3bc0d1f0ede4d0bb6e3c7544e02' 
  AND token = 'liENfbrhETRe3JpSlCjm98UjXRkcibVeVCwdvkOsui0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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