Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bd3352eb1f22673711f74ac3bcc041da8b6e082919be9c901e7721b758642e7' 
  AND token = '2EON/zuEp74bCZ5lEDZWRINtpkxRose8KX6spc6KFb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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