Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8c15fd557e9d1937ae38a495b6ab79ccc8b5252440a45d6c0c031bb489f8db8' 
  AND token = 'ihsuwiUUCnsSBrRMK2aCm5qlLgbMDM7wcAP5O7/LSX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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