Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a030be2adade8b430df38a5de2490c62ceba86167dd7500f4d90ec4c59d8e70' 
  AND token = 'EwSn2LhJZ9EV1dKvGp+wU0w+X2mwztfGIMGgg7MpAfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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