Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2022ae4f8c8752e3dd7131fd994ad9b76d5b97b597a3b362df369003d3c6e0b5' 
  AND token = '6yI/f2ay+LYSk90ee31u2/7cUPWKIPxdJCrDhK8Ch4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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