Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b50aff42137a3fa29439e8409b6b0cc335535ddb22774427b25237c1ae2302c' 
  AND token = 'q5VRwgwmLxlxqHDf3/wFDkLq8jsbNiweCQoYRTfknzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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