Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd9e03aa383eb4330f5094f4856e9430eec750107c5ff9cc22c8efa29dddd9fe' 
  AND token = 'h0cvPCVVLYCGK2gd2Q+M9o4uIkeWHmC6zrBRnGNO3nA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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