Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8fed429d95ff071c451459e2f4dd7fb42eabd5b6a5ea128e1be722e80bd5c04' 
  AND token = 'ucLE8IMfrrwjJie3mwwJYq5t7IzJJoTcu2AQWp0v8VY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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