Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60bdf8bfdb19f9cd5aa4c994f8af9f8bc01e720285170adddc8fe4ceb7ce864c' 
  AND token = 'mO4wuuHEnR/b6f8+oiL7T0H1eRsGeDujGS+nRNOUg0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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