Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7754024e103479670eaa8ba119e3f384b8b059979aff3409b00ba55840e74981' 
  AND token = 'yiTZ+a+OhXSvLzEAfYzrqW7ofXmPmzaP57HIWO1of5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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