Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abbb349a2fd409da1b37cc31282e66b72499cdfc7f189b1cab55423cb0f1616c' 
  AND token = 'YMjqQd3mh2dJmO971HGd8uEam1P4P0eSz1krF4/gvg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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