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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd898105d1cba5ae7e4178d5257b116ae421d271c85246f580181fd7af04d5826' 
  AND token = 'YthiSkVeIDfLMUdZ0aEEeKxVTDjBtOEERbOqI0jdVQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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