Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cfab2e912d73867d3129f940cefb4ba4308f4e76197c1f505685bb6d16f21be' 
  AND token = 'UsArjKGljh7Px8TRU+ncDIWD6Ff3eoa6tIbTbaG8cu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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