Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d0948ca8b293d9ef55bcb5c1f7f0c72b2bf04ad547cac9aae867b24991bf7cb' 
  AND token = 'QaroKKa9g6Pf8klZb+YoxwKNb+iflbS9Z8oDdnSp5WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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