Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e07ba11b2b7ec6aab82daf0b97c707c89c6c418657461e615e4e18af7ae9b268' 
  AND token = 'rW3jgFg96Wai6B5R7TZE004AXVx8ZbEy6DNnzvpV+4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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