Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79efc2ec2cda2803306771414d0dec04b8acc465a01c68d8fdc4b4b3f5b01f8b' 
  AND token = 'lpD3jB+it3NIDZRkmfZOzhhxtUS7MKW9XKKQYKX02dM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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