Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e22d2f453f7887ed1cf9fc3bc7aded5933346076f166da5584c2e3e10bbe400' 
  AND token = 'e70JH2boThoy+ePRsFTRQPM6mt5xRq1YjP1lKh/+Pq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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