SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdd7496598ac237a8dc658f4e7bfae3a5ac24515da30719a32b4b70f6ef4107c' 
  AND token = 'wU4YzSBGSJ6RLgwMfbWKMZjx4xyYI78+ZLXxyRfUPLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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