Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c53133c311846e33fb2ef94b2f7e09f3572d6d6faf31536be1356c47763da97' 
  AND token = 'bInxGRZuZAMvVNlxlZcj4LcF9TWRAfoua5mVA5ZdMbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}