Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b72ce0ad5c5a12fed43a804f04e755a8a535785af0909573b9903283a3af3fee' 
  AND token = 'G41ZSxJ9pfk+so2i/NPcO6+PprwGngjhAUbolhsrPKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}