Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cef58f2bd375d96ae702b47b3a66b913a2f77522b52c35e46824210b029652a3' 
  AND token = '4Rm4s4Zzzw6b6c723b8WwN/3nHL4X6OP/RlwDF6HRQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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