Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee77a27bc36c033b0697713c6732670a77c07ddc41b6a27b3cc57e39e5656343' 
  AND token = 'znYjrXlGQEaGJWbm5LGl7oujm1EZTkwKUDvRj8B7gs0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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