Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8c3171b569ab0ac122183fbad166ea8302a642d35a633f1ea8c7d1d86f4723c' 
  AND token = 'TeIGWODg6KzFBW1zHo1s6LeV443XWPEPHwdoCkxqS3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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