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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ccd288c4507401572dc3436d0c0804a96d556c7bb29a575e24727c738574c67' 
  AND token = 'lO1HmZM8gg1MWg0AgDq61W8fUMuJ5ORJQzFE2dSAhEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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