Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4f4e768786cb283336a7b24748a36ace2441678fddae4ac4e096dc13a472258' 
  AND token = '76CKYK6V5S874Sh32AX9IjEMYEbGpTYfwgwbvL188bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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