Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '412acd47ae1b1b7d97e9bc10b7dc382fb69a0fe6455ef860ac182614c29f1a62' 
  AND token = 'KwrFrz5MZLlRCgGaRmYeMD3AJVaKoPgc0DGkttEsUP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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