SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '633c3a4e71dfde510866824ef6c7a1c30550e4f19c6bf07fc7fc1c3596bb2797' 
  AND token = 'zlmQDsLsO2Cig+YEIwrJZ/XjRHSjhzOkR52UNJbNnpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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