Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9572dd706ed5d0daae437af2643013c57e202f1451132c4946223797e47e1ada' 
  AND token = 'bcv5a/4uuz05BGcnU5o3rtPL1GjgRAlWqlSkGzzZ0Y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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