Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33be1945fae6e22079a2b64dc5909fb0f7303b0349d468720102b3d75b66dd12' 
  AND token = '440I329lmcUVZqDBRGJk+e5/7BZrUUzlf3ZMdEnssHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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