Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00c0e7f8690754694785c5126e2dde9864fd9c13025ad314ebf81f7fb1239c9f' 
  AND token = 'pCA5/NUOOZLNSQKm8s/SudCYEl9YFSrYrKBV934X19o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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