Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c6f7a33f915c0d8a42592afb728dc94c251f8b49f41b903e0db6a8601b2da24' 
  AND token = 'uh2EIPPDn050pgMI738/5febBwgQ8XaDzJCzG9X6qHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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