Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5c3450a0090fb94892c4eac0d2c9ed56fcc0e484c087307f3cd4972fbc3d449' 
  AND token = 'AMUz8SwA/Q1x06UG6dCl17jSzWwLPHdzyvaSy1SFVLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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