Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e619fa166a776d71f34a63f6f07c0e19c45dd48a97783e0f28f0adefb93f624' 
  AND token = 'JolDtIXzzwFj8nOO829KNxx5GpSBA1r2VG09RvLPib8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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